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Further deyelopment

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dependent on the speed and supply voltage, adapts the ignition energy to the specific need and prevents un-necessary energy consumption in the ignition coil.

A particular advantage of the Motronic is that the ignition timing point in the full-load rangę is set for maximum tor-que, except in those ranges where consideration must be given to the octane requirement. In the part-load rangę the ignition timing point is set for minimum consumption whilst at the same time adhering to the limits of ex-haust-gas emission. Changes in load are registered by the Motronic imme-diately. At each revolution of the en-gine the Computer enąuires of the operating condition of the engine and with the help of the programmed values, calculates therefrom the new dwell angle. This brings speedy adjust-ment to modified operating conditions.

Fig. 45 Motronic błock diagram

Fig. 46 Diagram o I the Motronic system

1 Fuel tank, 2 Fuel pump. 3 Fuel filter, 4 Distributor tubę, 5 Pressure regulator. 6 Air-flow sensor, 7 Intake-air temperature-sensor. 8 Throttle-valve switch, 9 Engine-temperature sensor, to Contro! unit, 11 Reference-mark sensor, 12 Speed sensor, 13Flywheel, 14Battery, 15 Ignition and starter switch, l6Mainrelay, 17 Pump reiay, 18 High-voltage distributor. 19 Spark pług. 20 Ignition coil, 21 Injection valve, 22 Stan valve, 23 Thermo-time switch, 24 Auxiiiary-air device. 25 ldie-mixture adjustment-screw, 26 Idle-speed adjustment-screw, 27 Throttle valve.